427392709 has 2 divisors, whose sum is σ = 427392710. Its totient is φ = 427392708.

The previous prime is 427392703. The next prime is 427392743. The reversal of 427392709 is 907293724.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408444100 + 18948609 = 20210^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 427392709 - 2³ = 427392701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427392701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213696354 + 213696355.

It is an arithmetic number, because the mean of its divisors is an integer number (213696355).

Almost surely, 2^427392709 is an apocalyptic number.

It is an amenable number.

427392709 is a deficient number, since it is larger than the sum of its proper divisors (1).

427392709 is an equidigital number, since it uses as much as digits as its factorization.

427392709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 427392709 is about 20673.4783962448. The cubic root of 427392709 is about 753.2556011154.

The spelling of 427392709 in words is "four hundred twenty-seven million, three hundred ninety-two thousand, seven hundred nine".